Effect of Hydroxyapatite Coating in Combination with Physical Modifications on Microshear Bond Strength of Zirconia to Resin Cement

Table 2

Dispersion and type of failure mode among the 4 study groups.

Groups	Adhesive	Cohesive	Mixed
(1) Sandblasting with Al2O3	11 (73.3%)	1 (6.7%)	3 (20%)
(2) HA coating	8 (53.3%)	2 (13.3%)	5 (33.3%)
(3) Sandblasting + HA coating	9 (60.0%)	3 (20.0%)	3 (20.0%)
(4) Er, Cr: YSGG + HA coating	8 (53.3%)	2 (13.3%)	5 (33.3%)